1 | package com.framsticks.params; |
---|
2 | |
---|
3 | import java.lang.reflect.Field; |
---|
4 | import java.lang.reflect.InvocationTargetException; |
---|
5 | import java.lang.reflect.Modifier; |
---|
6 | |
---|
7 | import org.apache.log4j.Logger; |
---|
8 | |
---|
9 | import com.framsticks.util.lang.Containers; |
---|
10 | |
---|
11 | |
---|
12 | /** |
---|
13 | * The Class ReflectionAccess. Stores data in provided object using reflection. |
---|
14 | * |
---|
15 | * @author Mateusz Jarus <name.surname@gmail.com> (please replace name and |
---|
16 | * surname with my personal data) |
---|
17 | * |
---|
18 | * @author Piotr Sniegowski |
---|
19 | */ |
---|
20 | public class ReflectionAccess extends SimpleAbstractAccess { |
---|
21 | private final static Logger log = Logger.getLogger(ReflectionAccess.class.getName()); |
---|
22 | |
---|
23 | protected final Class<?> reflectedClass; |
---|
24 | private Object object; |
---|
25 | |
---|
26 | public ReflectionAccess(Class<?> reflectedClass, FramsClass framsClass) { |
---|
27 | this.reflectedClass = reflectedClass; |
---|
28 | setFramsClass(framsClass); |
---|
29 | } |
---|
30 | |
---|
31 | private static String accessorName(boolean get, String id) { |
---|
32 | return (get ? "get" : "set") + id.substring(0, 1).toUpperCase() + id.substring(1); |
---|
33 | } |
---|
34 | |
---|
35 | @Override |
---|
36 | public <T> T get(ValueParam param, Class<T> type) { |
---|
37 | if (object == null) { |
---|
38 | return null; |
---|
39 | } |
---|
40 | try { |
---|
41 | //TODO: use internal id, if present |
---|
42 | String id = param.getId(); |
---|
43 | try { |
---|
44 | return type.cast(reflectedClass.getField(id).get(object)); |
---|
45 | } catch (NoSuchFieldException ignored) { |
---|
46 | } |
---|
47 | try { |
---|
48 | return type.cast(reflectedClass.getMethod(accessorName(true, id)).invoke(object)); |
---|
49 | } catch (NoSuchMethodException | InvocationTargetException ex) { |
---|
50 | //e.printStackTrace(); |
---|
51 | } |
---|
52 | try { |
---|
53 | return type.cast(reflectedClass.getMethod(id).invoke(object)); |
---|
54 | } catch (NoSuchMethodException | InvocationTargetException ex) { |
---|
55 | //e.printStackTrace(); |
---|
56 | } |
---|
57 | |
---|
58 | } catch (IllegalAccessException e) { |
---|
59 | log.warn("illegal access error occurred while trying to access returnedObject"); |
---|
60 | e.printStackTrace(); |
---|
61 | } catch (ClassCastException ignored) { |
---|
62 | |
---|
63 | } |
---|
64 | return null; |
---|
65 | } |
---|
66 | |
---|
67 | @Override |
---|
68 | protected <T> void internalSet(ValueParam param, T value) { |
---|
69 | setValue(param, value); |
---|
70 | } |
---|
71 | |
---|
72 | private <T> void setValue(ValueParam param, T value) { |
---|
73 | if (object == null) { |
---|
74 | return; |
---|
75 | } |
---|
76 | try { |
---|
77 | String id = param.getId(); |
---|
78 | try { |
---|
79 | Field f = reflectedClass.getField(id); |
---|
80 | Class<?> t = f.getType(); |
---|
81 | if (Modifier.isFinal(f.getModifiers())) { |
---|
82 | return; |
---|
83 | } |
---|
84 | if (value != null || (!t.isPrimitive())) { |
---|
85 | f.set(object, value); |
---|
86 | } |
---|
87 | return; |
---|
88 | } catch (NoSuchFieldException ignored) { |
---|
89 | } |
---|
90 | try { |
---|
91 | reflectedClass.getMethod(accessorName(false, id), new Class[]{param.getStorageType()}).invoke(object, value); |
---|
92 | } catch (InvocationTargetException | NoSuchMethodException ignored) { |
---|
93 | } |
---|
94 | try { |
---|
95 | reflectedClass.getMethod(id, new Class[]{param.getStorageType()}).invoke(object, value); |
---|
96 | } catch (InvocationTargetException | NoSuchMethodException ignored) { |
---|
97 | } |
---|
98 | } catch (Exception ex) { |
---|
99 | ex.printStackTrace(); |
---|
100 | } |
---|
101 | } |
---|
102 | |
---|
103 | void resetErrors() { |
---|
104 | //TODO this replaces returnedObject.resetErrors(); |
---|
105 | } |
---|
106 | |
---|
107 | @Override |
---|
108 | public void clearValues() { |
---|
109 | if (object == null) { |
---|
110 | return; |
---|
111 | } |
---|
112 | |
---|
113 | resetErrors(); |
---|
114 | |
---|
115 | try { |
---|
116 | for (ValueParam p : Containers.filterInstanceof(framsClass.getParamEntries(), ValueParam.class)) { |
---|
117 | setValue(p, p.getDef(Object.class)); |
---|
118 | } |
---|
119 | } catch (IllegalArgumentException ex) { |
---|
120 | ex.printStackTrace(); |
---|
121 | } |
---|
122 | } |
---|
123 | |
---|
124 | /** |
---|
125 | * Sets the new object to operate on. |
---|
126 | * |
---|
127 | * @param object |
---|
128 | * new object to operate on |
---|
129 | */ |
---|
130 | @Override |
---|
131 | public ReflectionAccess select(Object object) { |
---|
132 | assert object == null || reflectedClass.isInstance(object); |
---|
133 | this.object = object; |
---|
134 | return this; |
---|
135 | } |
---|
136 | |
---|
137 | @Override |
---|
138 | public Object getSelected() { |
---|
139 | return object; |
---|
140 | } |
---|
141 | |
---|
142 | // TODO: find a better place for it |
---|
143 | public static String objectToString(Object object) { |
---|
144 | StringBuilder b = new StringBuilder(); |
---|
145 | for (Field f : object.getClass().getFields()) { |
---|
146 | b.append(f.getName()); |
---|
147 | b.append(":"); |
---|
148 | try { |
---|
149 | Object value = f.get(object); |
---|
150 | b.append((value != null) ? value.toString() : "<null>"); |
---|
151 | } catch (IllegalAccessException e) { |
---|
152 | e.printStackTrace(); |
---|
153 | } |
---|
154 | b.append("\n"); |
---|
155 | } |
---|
156 | return b.toString(); |
---|
157 | } |
---|
158 | |
---|
159 | |
---|
160 | @Override |
---|
161 | public ReflectionAccess cloneAccess() { |
---|
162 | return new ReflectionAccess(reflectedClass, framsClass); |
---|
163 | } |
---|
164 | |
---|
165 | @Override |
---|
166 | public Object createAccessee() { |
---|
167 | try { |
---|
168 | return reflectedClass.newInstance(); |
---|
169 | } catch (InstantiationException | IllegalAccessException e) { |
---|
170 | e.printStackTrace(); |
---|
171 | } |
---|
172 | log.fatal("failed to create reflected object of class " + reflectedClass.getCanonicalName() + " for frams type " + framsClass.getId()); |
---|
173 | return null; |
---|
174 | } |
---|
175 | } |
---|